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From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2735) HA: add tests for multiple shared edits dirs
Date Thu, 05 Jan 2012 23:33:39 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180948#comment-13180948

Eli Collins commented on HDFS-2735:

Per [this comment|https://issues.apache.org/jira/browse/HDFS-2709?focusedCommentId=13176986&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13176986]
we should test that a failure from one of the shared dirs will not prevent progress (currently
if one fails the tailer will not catch up).
> HA: add tests for multiple shared edits dirs
> --------------------------------------------
>                 Key: HDFS-2735
>                 URL: https://issues.apache.org/jira/browse/HDFS-2735
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, test
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Eli Collins
>            Assignee: Uma Maheswara Rao G
> You can configure and run with multiple shared edits dirs but we don't have any test
coverage for them. In particular, we should cover the behavior of the edit log tailer with
multiple dirs, and failure scenarios (eg can we tolerate a single shared dir failure if we
have two shared dirs).

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